Debian dla-4456 : openjdk-17-dbg - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-4456. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(296612);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/03");

  script_cve_id(
    "CVE-2026-21925",
    "CVE-2026-21932",
    "CVE-2026-21933",
    "CVE-2026-21945"
  );

  script_name(english:"Debian dla-4456 : openjdk-17-dbg - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-4456 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4456-1                [email protected]
    https://www.debian.org/lts/security/               Emilio Pozuelo Monfort
    January 26, 2026                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : openjdk-17
    Version        : 17.0.18+8-1~deb11u1
    CVE ID         : CVE-2026-21925 CVE-2026-21932 CVE-2026-21933 CVE-2026-21945

    Several vulnerabilities have been discovered in the OpenJDK Java
    runtime, which may result in incorrect certificate validation,
    CRLF injection or man-in-the-middle attacks.

    For Debian 11 bullseye, these problems have been fixed in version
    17.0.18+8-1~deb11u1.

    We recommend that you upgrade your openjdk-17 packages.

    For the detailed security status of openjdk-17 please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/openjdk-17

    Further information about Debian LTS security advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/openjdk-17");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-21925");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-21932");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-21933");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-21945");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/openjdk-17");
  script_set_attribute(attribute:"solution", value:
"Upgrade the openjdk-17-dbg packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-21932");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-21925");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/01/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/26");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openjdk-17-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openjdk-17-demo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openjdk-17-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openjdk-17-jdk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openjdk-17-jdk-headless");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openjdk-17-jre");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openjdk-17-jre-headless");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openjdk-17-jre-zero");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openjdk-17-source");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(11)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 11.0', 'Debian ' + debian_release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '11.0', 'prefix': 'openjdk-17-dbg', 'reference': '17.0.18+8-1~deb11u1'},
    {'release': '11.0', 'prefix': 'openjdk-17-demo', 'reference': '17.0.18+8-1~deb11u1'},
    {'release': '11.0', 'prefix': 'openjdk-17-doc', 'reference': '17.0.18+8-1~deb11u1'},
    {'release': '11.0', 'prefix': 'openjdk-17-jdk', 'reference': '17.0.18+8-1~deb11u1'},
    {'release': '11.0', 'prefix': 'openjdk-17-jdk-headless', 'reference': '17.0.18+8-1~deb11u1'},
    {'release': '11.0', 'prefix': 'openjdk-17-jre', 'reference': '17.0.18+8-1~deb11u1'},
    {'release': '11.0', 'prefix': 'openjdk-17-jre-headless', 'reference': '17.0.18+8-1~deb11u1'},
    {'release': '11.0', 'prefix': 'openjdk-17-jre-zero', 'reference': '17.0.18+8-1~deb11u1'},
    {'release': '11.0', 'prefix': 'openjdk-17-source', 'reference': '17.0.18+8-1~deb11u1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var _release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (_release && prefix && reference) {
    if (deb_check(release:_release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'openjdk-17-dbg / openjdk-17-demo / openjdk-17-doc / openjdk-17-jdk / etc');
}